Answer:
B. 
Step-by-step explanation:
substitute u for (x+2)

use the quadratic formula



Then set everything equal to u: (x+2)

u-2= -12 plus-or-minus 10 sqrt{2}/2
Step-by-step explanation:
Create two arcs on the original line.
Place the compass on two points on the original line, one after another for marking a point.
make a line from the original point on the line to the marked point (MP)
the sketch as attached
Answer:
For the question on the right, I assume b is the exponential factor, or growth factor.
Step-by-step explanation:
Linear:

You can find the equation by using two points and the equation for a line.
Exponential:

AB- 3in.
BC- 5in.
CD- 7.2in.
sorry i don't really have an explanation I just looked at the picture and i guess imagined it in my head? lol sorry but here are the answers I hope that helps at least a little bit :))
Answer is 20.3 and the steps are:
1.) 7 x 9 = 63 move the six over the 2 leave the 3 down
2.) 7 x 2 = 14
3.) 14 + 6 = 20
4.) you have 203 but must bring the decimal down and it makes it: 20.3
I hope I helped and if you're confused please ask questions